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This article is about the hamburger. As of October, 2017, it is not offered for sale in the United States. It was later reformulated as a more standard double burger during the latter part of product testing in 1997. It was given its current name when the product was formally introduced in September 1997, but maintained the more conventional double cheeseburger format. 2001 when it was slightly reformulated as part of a menu restructuring during a period of corporate decline.
When the Stacker line was discontinued in the United States shortly after, the Big King returned in November 2013 as a permanent product. Despite being off the menu in the United States for several years, the product was still sold in several other countries under several names during the interim of its unavailability in the United States. XXL line was the center of controversy over product health standards and advertising in Spain when first introduced. There is a chicken variant of the sandwich in the United States and Canada.